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Unified Diff: media/midi/midi_manager_mac.h

Issue 16025005: Web MIDI API back-end (work-in-progress) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: add stub for non-OSX MIDIManagers Created 7 years, 6 months ago
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Index: media/midi/midi_manager_mac.h
diff --git a/media/midi/midi_manager_mac.h b/media/midi/midi_manager_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..f513e119c0e0551cc2e9d945a9e8362bcf8442a9
--- /dev/null
+++ b/media/midi/midi_manager_mac.h
@@ -0,0 +1,69 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_MIDI_MIDI_MANAGER_MAC_H_
+#define MEDIA_MIDI_MIDI_MANAGER_MAC_H_
+
+#include <CoreMIDI/MIDIServices.h>
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "media/midi/midi_manager.h"
+#include "media/midi/midi_port_info.h"
+
+namespace media {
+
+class MEDIA_EXPORT MIDIManagerMac : public MIDIManager {
+ public:
+ MIDIManagerMac();
+ virtual ~MIDIManagerMac();
+
+ // MIDIManager implementation.
+ virtual bool Initialize() OVERRIDE;
+ virtual void SendMIDIData(int port_index,
+ const uint8* data,
+ size_t length,
+ double timestamp) OVERRIDE;
+
+ private:
+ // CoreMIDI callback for MIDI data.
+ // Each callback can contain multiple packets, each of which can contain
+ // multiple MIDI messages.
+ static void ReadMidiDispatch(
+ const MIDIPacketList *pktlist,
+ void *read_proc_refcon,
+ void *src_conn_refcon);
+ virtual void ReadMidi(MIDIEndpointRef source, const MIDIPacketList *pktlist);
+
+ // Helper
+ static media::MIDIPortInfo GetPortInfoFromEndpoint(MIDIEndpointRef endpoint);
+ static double MIDITimeStampToSeconds(MIDITimeStamp timestamp);
+ static MIDITimeStamp SecondsToMIDITimeStamp(double seconds);
+
+ // CoreMIDI
+ MIDIClientRef midi_client_;
+ MIDIPortRef coremidi_input_;
+ MIDIPortRef coremidi_output_;
+
+ enum{ kMaxPacketListSize = 512 };
+ char midi_buffer_[kMaxPacketListSize];
+ MIDIPacketList* packet_list_;
+ MIDIPacket* midi_packet_;
+
+ typedef std::map<MIDIEndpointRef, int> SourceMap;
+
+ // Keeps track of the index (0-based) for each of our sources.
+ SourceMap source_map_;
+
+ // Keeps track of all destinations.
+ std::vector<MIDIEndpointRef> destinations_;
+
+ DISALLOW_COPY_AND_ASSIGN(MIDIManagerMac);
+};
+
+} // namespace media
+
+#endif // MEDIA_MIDI_MIDI_MANAGER_MAC_H_

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